projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Char: moxa, cleanup rx/tx
[deliverable/linux.git] / drivers / char / moxa.c
CommitLineData
1da177e4
LT		 1/*****************************************************************************/
2/*
3 * moxa.c -- MOXA Intellio family multiport serial driver.
4 *
5 * Copyright (C) 1999-2000 Moxa Technologies (support@moxa.com.tw).
6 *
7 * This code is loosely based on the Linux serial driver, written by
8 * Linus Torvalds, Theodore T'so and others.
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
1da177e4
LT		 14 */
15
16/*
17 * MOXA Intellio Series Driver
18 * for : LINUX
19 * date : 1999/1/7
20 * version : 5.1
21 */
22
1da177e4
LT		 23#include <linux/module.h>
24#include <linux/types.h>
25#include <linux/mm.h>
26#include <linux/ioport.h>
27#include <linux/errno.h>
03718234 28#include <linux/firmware.h>
1da177e4
LT		 29#include <linux/signal.h>
30#include <linux/sched.h>
31#include <linux/timer.h>
32#include <linux/interrupt.h>
33#include <linux/tty.h>
34#include <linux/tty_flip.h>
35#include <linux/major.h>
36#include <linux/string.h>
37#include <linux/fcntl.h>
38#include <linux/ptrace.h>
39#include <linux/serial.h>
40#include <linux/tty_driver.h>
41#include <linux/delay.h>
42#include <linux/pci.h>
43#include <linux/init.h>
44#include <linux/bitops.h>
95e07914 45#include <linux/completion.h>
1da177e4
LT		 46
47#include <asm/system.h>
48#include <asm/io.h>
49#include <asm/uaccess.h>
50
03718234
JS		 51#include "moxa.h"
52
11324edd 53#define MOXA_VERSION "5.1k"
1da177e4 54
03718234
JS		 55#define MOXA_FW_HDRLEN 32
56
11324edd
JS		 57#define MOXAMAJOR 172
58#define MOXACUMAJOR 173
1da177e4 59
11324edd 60#define MAX_BOARDS 4 /* Don't change this value */
1da177e4 61#define MAX_PORTS_PER_BOARD 32 /* Don't change this value */
11324edd 62#define MAX_PORTS (MAX_BOARDS * MAX_PORTS_PER_BOARD)
1da177e4
LT		 63
64/*
65 * Define the Moxa PCI vendor and device IDs.
66 */
11324edd
JS		 67#define MOXA_BUS_TYPE_ISA 0
68#define MOXA_BUS_TYPE_PCI 1
1da177e4 69
1da177e4
LT		 70enum {
71 MOXA_BOARD_C218_PCI = 1,
72 MOXA_BOARD_C218_ISA,
73 MOXA_BOARD_C320_PCI,
74 MOXA_BOARD_C320_ISA,
75 MOXA_BOARD_CP204J,
76};
77
78static char *moxa_brdname[] =
79{
80 "C218 Turbo PCI series",
81 "C218 Turbo ISA series",
82 "C320 Turbo PCI series",
83 "C320 Turbo ISA series",
84 "CP-204J series",
85};
86
87#ifdef CONFIG_PCI
88static struct pci_device_id moxa_pcibrds[] = {
5ebb4078
JS		 89 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C218),
90 .driver_data = MOXA_BOARD_C218_PCI },
91 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C320),
92 .driver_data = MOXA_BOARD_C320_PCI },
93 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP204J),
94 .driver_data = MOXA_BOARD_CP204J },
1da177e4
LT		 95 { 0 }
96};
97MODULE_DEVICE_TABLE(pci, moxa_pcibrds);
98#endif /* CONFIG_PCI */
99
03718234
JS		 100struct moxa_port;
101
8f8ecbad 102static struct moxa_board_conf {
1da177e4
LT		 103 int boardType;
104 int numPorts;
1da177e4 105 int busType;
8f8ecbad 106
810ab09b 107 unsigned int ready;
8f8ecbad 108
03718234
JS		 109 struct moxa_port *ports;
110
8f8ecbad
JS		 111 void __iomem *basemem;
112 void __iomem *intNdx;
113 void __iomem *intPend;
114 void __iomem *intTable;
115} moxa_boards[MAX_BOARDS];
116
117struct mxser_mstatus {
118 tcflag_t cflag;
119 int cts;
120 int dsr;
121 int ri;
122 int dcd;
9dff89cd 123};
1da177e4 124
8f8ecbad
JS		 125struct moxaq_str {
126 int inq;
127 int outq;
128};
1da177e4 129
8f8ecbad 130struct moxa_port {
b4173f45 131 struct moxa_board_conf *board;
7bcf97d1
JS		 132 struct tty_struct *tty;
133 void __iomem *tableAddr;
134
1da177e4 135 int type;
1da177e4 136 int close_delay;
1da177e4
LT		 137 int count;
138 int blocked_open;
1da177e4 139 int asyncflags;
1da177e4 140 int cflag;
7bcf97d1 141 unsigned long statusflags;
1da177e4 142 wait_queue_head_t open_wait;
95e07914 143 struct completion close_wait;
1da177e4 144
7bcf97d1
JS		 145 u8 DCDState;
146 u8 lineCtrl;
147 u8 lowChkFlag;
8f8ecbad 148};
1da177e4 149
74d7d97b
JS		 150struct mon_str {
151 int tick;
152 int rxcnt[MAX_PORTS];
153 int txcnt[MAX_PORTS];
154};
155
1da177e4
LT		 156/* statusflags */
157#define TXSTOPPED 0x1
158#define LOWWAIT 0x2
159#define EMPTYWAIT 0x4
160#define THROTTLE 0x8
161
1da177e4
LT		 162#define SERIAL_DO_RESTART
163
1da177e4
LT		 164#define WAKEUP_CHARS 256
165
1da177e4 166static int ttymajor = MOXAMAJOR;
74d7d97b
JS		 167static struct mon_str moxaLog;
168static unsigned int moxaFuncTout = HZ / 2;
7bcf97d1 169static unsigned int moxaLowWaterChk;
1da177e4
LT		 170/* Variables for insmod */
171#ifdef MODULE
d353eca4
JS		 172static unsigned long baseaddr[MAX_BOARDS];
173static unsigned int type[MAX_BOARDS];
174static unsigned int numports[MAX_BOARDS];
1da177e4
LT		 175#endif
176
177MODULE_AUTHOR("William Chen");
178MODULE_DESCRIPTION("MOXA Intellio Family Multiport Board Device Driver");
179MODULE_LICENSE("GPL");
180#ifdef MODULE
d353eca4
JS		 181module_param_array(type, uint, NULL, 0);
182MODULE_PARM_DESC(type, "card type: C218=2, C320=4");
183module_param_array(baseaddr, ulong, NULL, 0);
184MODULE_PARM_DESC(baseaddr, "base address");
185module_param_array(numports, uint, NULL, 0);
186MODULE_PARM_DESC(numports, "numports (ignored for C218)");
1da177e4
LT		 187#endif
188module_param(ttymajor, int, 0);
1da177e4 189
1da177e4
LT		 190/*
191 * static functions:
192 */
1da177e4
LT		 193static int moxa_open(struct tty_struct *, struct file *);
194static void moxa_close(struct tty_struct *, struct file *);
195static int moxa_write(struct tty_struct *, const unsigned char *, int);
196static int moxa_write_room(struct tty_struct *);
197static void moxa_flush_buffer(struct tty_struct *);
198static int moxa_chars_in_buffer(struct tty_struct *);
199static void moxa_flush_chars(struct tty_struct *);
200static void moxa_put_char(struct tty_struct *, unsigned char);
1da177e4
LT		 201static void moxa_throttle(struct tty_struct *);
202static void moxa_unthrottle(struct tty_struct *);
606d099c 203static void moxa_set_termios(struct tty_struct *, struct ktermios *);
1da177e4
LT		 204static void moxa_stop(struct tty_struct *);
205static void moxa_start(struct tty_struct *);
206static void moxa_hangup(struct tty_struct *);
207static int moxa_tiocmget(struct tty_struct *tty, struct file *file);
208static int moxa_tiocmset(struct tty_struct *tty, struct file *file,
209 unsigned int set, unsigned int clear);
210static void moxa_poll(unsigned long);
db1acaa6 211static void moxa_set_tty_param(struct tty_struct *, struct ktermios *);
6f56b658 212static int moxa_block_till_ready(struct tty_struct *, struct file *,
8f8ecbad 213 struct moxa_port *);
6f56b658 214static void moxa_setup_empty_event(struct tty_struct *);
6f56b658 215static void moxa_shut_down(struct moxa_port *);
1da177e4
LT		 216/*
217 * moxa board interface functions:
218 */
b4173f45
JS		 219static void MoxaPortEnable(struct moxa_port *);
220static void MoxaPortDisable(struct moxa_port *);
221static int MoxaPortSetTermio(struct moxa_port *, struct ktermios *, speed_t);
222static int MoxaPortGetLineOut(struct moxa_port *, int *, int *);
223static void MoxaPortLineCtrl(struct moxa_port *, int, int);
224static void MoxaPortFlowCtrl(struct moxa_port *, int, int, int, int, int);
225static int MoxaPortLineStatus(struct moxa_port *);
b4173f45 226static void MoxaPortFlushData(struct moxa_port *, int);
2108eba5 227static int MoxaPortWriteData(struct moxa_port *, const unsigned char *, int);
7bcf97d1 228static int MoxaPortReadData(struct moxa_port *);
b4173f45
JS		 229static int MoxaPortTxQueue(struct moxa_port *);
230static int MoxaPortRxQueue(struct moxa_port *);
231static int MoxaPortTxFree(struct moxa_port *);
232static void MoxaPortTxDisable(struct moxa_port *);
233static void MoxaPortTxEnable(struct moxa_port *);
8f8ecbad
JS		 234static int moxa_get_serial_info(struct moxa_port *, struct serial_struct __user *);
235static int moxa_set_serial_info(struct moxa_port *, struct serial_struct __user *);
b4173f45 236static void MoxaSetFifo(struct moxa_port *port, int enable);
1da177e4 237
74d7d97b
JS		 238/*
239 * I/O functions
240 */
241
242static void moxa_wait_finish(void __iomem *ofsAddr)
243{
244 unsigned long end = jiffies + moxaFuncTout;
245
246 while (readw(ofsAddr + FuncCode) != 0)
247 if (time_after(jiffies, end))
248 return;
249 if (readw(ofsAddr + FuncCode) != 0 && printk_ratelimit())
250 printk(KERN_WARNING "moxa function expired\n");
251}
252
253static void moxafunc(void __iomem *ofsAddr, int cmd, ushort arg)
254{
255 writew(arg, ofsAddr + FuncArg);
256 writew(cmd, ofsAddr + FuncCode);
257 moxa_wait_finish(ofsAddr);
258}
259
7bcf97d1
JS		 260static void moxa_low_water_check(void __iomem *ofsAddr)
261{
262 u16 rptr, wptr, mask, len;
263
264 if (readb(ofsAddr + FlagStat) & Xoff_state) {
265 rptr = readw(ofsAddr + RXrptr);
266 wptr = readw(ofsAddr + RXwptr);
267 mask = readw(ofsAddr + RX_mask);
268 len = (wptr - rptr) & mask;
269 if (len <= Low_water)
270 moxafunc(ofsAddr, FC_SendXon, 0);
271 }
272}
273
74d7d97b
JS		 274/*
275 * TTY operations
276 */
277
278static int moxa_ioctl(struct tty_struct *tty, struct file *file,
279 unsigned int cmd, unsigned long arg)
280{
281 struct moxa_port *ch = tty->driver_data;
282 void __user *argp = (void __user *)arg;
283 int status;
284
285 if (tty->index == MAX_PORTS) {
286 if (cmd != MOXA_GETDATACOUNT && cmd != MOXA_GET_IOQUEUE &&
287 cmd != MOXA_GETMSTATUS)
288 return -EINVAL;
289 } else if (!ch)
290 return -ENODEV;
291
292 switch (cmd) {
293 case MOXA_GETDATACOUNT:
294 moxaLog.tick = jiffies;
295 return copy_to_user(argp, &moxaLog, sizeof(moxaLog)) ?
296 -EFAULT : 0;
297 case MOXA_FLUSH_QUEUE:
298 MoxaPortFlushData(ch, arg);
299 return 0;
300 case MOXA_GET_IOQUEUE: {
301 struct moxaq_str __user *argm = argp;
302 struct moxaq_str tmp;
303 struct moxa_port *p;
304 unsigned int i, j;
305
306 for (i = 0; i < MAX_BOARDS; i++) {
307 p = moxa_boards[i].ports;
308 for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) {
309 memset(&tmp, 0, sizeof(tmp));
310 if (moxa_boards[i].ready) {
311 tmp.inq = MoxaPortRxQueue(p);
312 tmp.outq = MoxaPortTxQueue(p);
313 }
314 if (copy_to_user(argm, &tmp, sizeof(tmp)))
315 return -EFAULT;
316 }
317 }
318 return 0;
319 } case MOXA_GET_OQUEUE:
320 status = MoxaPortTxQueue(ch);
321 return put_user(status, (unsigned long __user *)argp);
322 case MOXA_GET_IQUEUE:
323 status = MoxaPortRxQueue(ch);
324 return put_user(status, (unsigned long __user *)argp);
325 case MOXA_GETMSTATUS: {
326 struct mxser_mstatus __user *argm = argp;
327 struct mxser_mstatus tmp;
328 struct moxa_port *p;
329 unsigned int i, j;
330
331 for (i = 0; i < MAX_BOARDS; i++) {
332 p = moxa_boards[i].ports;
333 for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) {
334 memset(&tmp, 0, sizeof(tmp));
335 if (!moxa_boards[i].ready)
336 goto copy;
337
338 status = MoxaPortLineStatus(p);
339 if (status & 1)
340 tmp.cts = 1;
341 if (status & 2)
342 tmp.dsr = 1;
343 if (status & 4)
344 tmp.dcd = 1;
345
346 if (!p->tty || !p->tty->termios)
347 tmp.cflag = p->cflag;
348 else
349 tmp.cflag = p->tty->termios->c_cflag;
350copy:
351 if (copy_to_user(argm, &tmp, sizeof(tmp)))
352 return -EFAULT;
353 }
354 }
355 return 0;
356 }
357 case TIOCGSERIAL:
358 return moxa_get_serial_info(ch, argp);
359 case TIOCSSERIAL:
360 return moxa_set_serial_info(ch, argp);
361 }
362 return -ENOIOCTLCMD;
363}
364
365static void moxa_break_ctl(struct tty_struct *tty, int state)
366{
367 struct moxa_port *port = tty->driver_data;
368
369 moxafunc(port->tableAddr, state ? FC_SendBreak : FC_StopBreak,
370 Magic_code);
371}
372
b68e31d0 373static const struct tty_operations moxa_ops = {
1da177e4
LT		 374 .open = moxa_open,
375 .close = moxa_close,
376 .write = moxa_write,
377 .write_room = moxa_write_room,
378 .flush_buffer = moxa_flush_buffer,
379 .chars_in_buffer = moxa_chars_in_buffer,
380 .flush_chars = moxa_flush_chars,
381 .put_char = moxa_put_char,
382 .ioctl = moxa_ioctl,
383 .throttle = moxa_throttle,
384 .unthrottle = moxa_unthrottle,
385 .set_termios = moxa_set_termios,
386 .stop = moxa_stop,
387 .start = moxa_start,
388 .hangup = moxa_hangup,
74d7d97b 389 .break_ctl = moxa_break_ctl,
1da177e4
LT		 390 .tiocmget = moxa_tiocmget,
391 .tiocmset = moxa_tiocmset,
392};
393
aa7e5221 394static struct tty_driver *moxaDriver;
aa7e5221 395static DEFINE_TIMER(moxaTimer, moxa_poll, 0, 0);
34af946a 396static DEFINE_SPINLOCK(moxa_lock);
33f0f88f 397
74d7d97b
JS		 398/*
399 * HW init
400 */
401
03718234
JS		 402static int moxa_check_fw_model(struct moxa_board_conf *brd, u8 model)
403{
404 switch (brd->boardType) {
405 case MOXA_BOARD_C218_ISA:
406 case MOXA_BOARD_C218_PCI:
407 if (model != 1)
408 goto err;
409 break;
410 case MOXA_BOARD_CP204J:
411 if (model != 3)
412 goto err;
413 break;
414 default:
415 if (model != 2)
416 goto err;
417 break;
418 }
419 return 0;
420err:
421 return -EINVAL;
422}
423
424static int moxa_check_fw(const void *ptr)
425{
426 const __le16 *lptr = ptr;
427
428 if (*lptr != cpu_to_le16(0x7980))
429 return -EINVAL;
430
431 return 0;
432}
433
434static int moxa_load_bios(struct moxa_board_conf *brd, const u8 *buf,
435 size_t len)
436{
437 void __iomem *baseAddr = brd->basemem;
438 u16 tmp;
439
440 writeb(HW_reset, baseAddr + Control_reg); /* reset */
441 msleep(10);
442 memset_io(baseAddr, 0, 4096);
443 memcpy_toio(baseAddr, buf, len); /* download BIOS */
444 writeb(0, baseAddr + Control_reg); /* restart */
445
446 msleep(2000);
447
448 switch (brd->boardType) {
449 case MOXA_BOARD_C218_ISA:
450 case MOXA_BOARD_C218_PCI:
451 tmp = readw(baseAddr + C218_key);
452 if (tmp != C218_KeyCode)
453 goto err;
454 break;
455 case MOXA_BOARD_CP204J:
456 tmp = readw(baseAddr + C218_key);
457 if (tmp != CP204J_KeyCode)
458 goto err;
459 break;
460 default:
461 tmp = readw(baseAddr + C320_key);
462 if (tmp != C320_KeyCode)
463 goto err;
464 tmp = readw(baseAddr + C320_status);
465 if (tmp != STS_init) {
466 printk(KERN_ERR "moxa: bios upload failed -- CPU/Basic "
467 "module not found\n");
468 return -EIO;
469 }
470 break;
471 }
472
473 return 0;
474err:
475 printk(KERN_ERR "moxa: bios upload failed -- board not found\n");
476 return -EIO;
477}
478
479static int moxa_load_320b(struct moxa_board_conf *brd, const u8 *ptr,
480 size_t len)
481{
482 void __iomem *baseAddr = brd->basemem;
483
484 if (len < 7168) {
485 printk(KERN_ERR "moxa: invalid 320 bios -- too short\n");
486 return -EINVAL;
487 }
488
489 writew(len - 7168 - 2, baseAddr + C320bapi_len);
490 writeb(1, baseAddr + Control_reg); /* Select Page 1 */
491 memcpy_toio(baseAddr + DynPage_addr, ptr, 7168);
492 writeb(2, baseAddr + Control_reg); /* Select Page 2 */
493 memcpy_toio(baseAddr + DynPage_addr, ptr + 7168, len - 7168);
494
495 return 0;
496}
497
5292bcd3 498static int moxa_real_load_code(struct moxa_board_conf *brd, const void *ptr,
03718234
JS		 499 size_t len)
500{
501 void __iomem *baseAddr = brd->basemem;
502 const u16 *uptr = ptr;
503 size_t wlen, len2, j;
5292bcd3
JS		 504 unsigned long key, loadbuf, loadlen, checksum, checksum_ok;
505 unsigned int i, retry, c320;
03718234
JS		 506 u16 usum, keycode;
507
5292bcd3
JS		 508 c320 = brd->boardType == MOXA_BOARD_C320_PCI ||
509 brd->boardType == MOXA_BOARD_C320_ISA;
510 keycode = (brd->boardType == MOXA_BOARD_CP204J) ? CP204J_KeyCode :
511 C218_KeyCode;
03718234 512
5292bcd3
JS		 513 switch (brd->boardType) {
514 case MOXA_BOARD_CP204J:
515 case MOXA_BOARD_C218_ISA:
516 case MOXA_BOARD_C218_PCI:
517 key = C218_key;
518 loadbuf = C218_LoadBuf;
519 loadlen = C218DLoad_len;
520 checksum = C218check_sum;
521 checksum_ok = C218chksum_ok;
522 break;
523 default:
524 key = C320_key;
525 keycode = C320_KeyCode;
526 loadbuf = C320_LoadBuf;
527 loadlen = C320DLoad_len;
528 checksum = C320check_sum;
529 checksum_ok = C320chksum_ok;
530 break;
03718234 531 }
03718234
JS		 532
533 usum = 0;
534 wlen = len >> 1;
535 for (i = 0; i < wlen; i++)
536 usum += le16_to_cpu(uptr[i]);
537 retry = 0;
538 do {
539 wlen = len >> 1;
540 j = 0;
541 while (wlen) {
542 len2 = (wlen > 2048) ? 2048 : wlen;
543 wlen -= len2;
5292bcd3 544 memcpy_toio(baseAddr + loadbuf, ptr + j, len2 << 1);
03718234 545 j += len2 << 1;
5292bcd3
JS		 546
547 writew(len2, baseAddr + loadlen);
548 writew(0, baseAddr + key);
549 for (i = 0; i < 100; i++) {
550 if (readw(baseAddr + key) == keycode)
03718234
JS		 551 break;
552 msleep(10);
553 }
5292bcd3 554 if (readw(baseAddr + key) != keycode)
03718234
JS		 555 return -EIO;
556 }
5292bcd3
JS		 557 writew(0, baseAddr + loadlen);
558 writew(usum, baseAddr + checksum);
559 writew(0, baseAddr + key);
560 for (i = 0; i < 100; i++) {
561 if (readw(baseAddr + key) == keycode)
03718234
JS		 562 break;
563 msleep(10);
564 }
565 retry++;
5292bcd3
JS		 566 } while ((readb(baseAddr + checksum_ok) != 1) && (retry < 3));
567 if (readb(baseAddr + checksum_ok) != 1)
03718234
JS		 568 return -EIO;
569
5292bcd3 570 writew(0, baseAddr + key);
03718234
JS		 571 for (i = 0; i < 600; i++) {
572 if (readw(baseAddr + Magic_no) == Magic_code)
573 break;
574 msleep(10);
575 }
576 if (readw(baseAddr + Magic_no) != Magic_code)
577 return -EIO;
578
5292bcd3
JS		 579 if (c320) {
580 if (brd->busType == MOXA_BUS_TYPE_PCI) { /* ASIC board */
581 writew(0x3800, baseAddr + TMS320_PORT1);
582 writew(0x3900, baseAddr + TMS320_PORT2);
583 writew(28499, baseAddr + TMS320_CLOCK);
584 } else {
585 writew(0x3200, baseAddr + TMS320_PORT1);
586 writew(0x3400, baseAddr + TMS320_PORT2);
587 writew(19999, baseAddr + TMS320_CLOCK);
588 }
03718234
JS		 589 }
590 writew(1, baseAddr + Disable_IRQ);
591 writew(0, baseAddr + Magic_no);
592 for (i = 0; i < 500; i++) {
593 if (readw(baseAddr + Magic_no) == Magic_code)
594 break;
595 msleep(10);
596 }
597 if (readw(baseAddr + Magic_no) != Magic_code)
598 return -EIO;
599
5292bcd3
JS		 600 if (c320) {
601 j = readw(baseAddr + Module_cnt);
602 if (j <= 0)
603 return -EIO;
604 brd->numPorts = j * 8;
605 writew(j, baseAddr + Module_no);
606 writew(0, baseAddr + Magic_no);
607 for (i = 0; i < 600; i++) {
608 if (readw(baseAddr + Magic_no) == Magic_code)
609 break;
610 msleep(10);
611 }
612 if (readw(baseAddr + Magic_no) != Magic_code)
613 return -EIO;
03718234 614 }
03718234
JS		 615 brd->intNdx = baseAddr + IRQindex;
616 brd->intPend = baseAddr + IRQpending;
617 brd->intTable = baseAddr + IRQtable;
618
619 return 0;
620}
621
622static int moxa_load_code(struct moxa_board_conf *brd, const void *ptr,
623 size_t len)
624{
625 void __iomem *ofsAddr, *baseAddr = brd->basemem;
626 struct moxa_port *port;
627 int retval, i;
628
629 if (len % 2) {
5292bcd3 630 printk(KERN_ERR "moxa: bios length is not even\n");
03718234
JS		 631 return -EINVAL;
632 }
633
5292bcd3
JS		 634 retval = moxa_real_load_code(brd, ptr, len); /* may change numPorts */
635 if (retval)
636 return retval;
637
03718234
JS		 638 switch (brd->boardType) {
639 case MOXA_BOARD_C218_ISA:
640 case MOXA_BOARD_C218_PCI:
641 case MOXA_BOARD_CP204J:
03718234
JS		 642 port = brd->ports;
643 for (i = 0; i < brd->numPorts; i++, port++) {
b4173f45 644 port->board = brd;
03718234
JS		 645 port->DCDState = 0;
646 port->tableAddr = baseAddr + Extern_table +
647 Extern_size * i;
648 ofsAddr = port->tableAddr;
649 writew(C218rx_mask, ofsAddr + RX_mask);
650 writew(C218tx_mask, ofsAddr + TX_mask);
651 writew(C218rx_spage + i * C218buf_pageno, ofsAddr + Page_rxb);
652 writew(readw(ofsAddr + Page_rxb) + C218rx_pageno, ofsAddr + EndPage_rxb);
653
654 writew(C218tx_spage + i * C218buf_pageno, ofsAddr + Page_txb);
655 writew(readw(ofsAddr + Page_txb) + C218tx_pageno, ofsAddr + EndPage_txb);
656
657 }
658 break;
659 default:
03718234
JS		 660 port = brd->ports;
661 for (i = 0; i < brd->numPorts; i++, port++) {
b4173f45 662 port->board = brd;
03718234
JS		 663 port->DCDState = 0;
664 port->tableAddr = baseAddr + Extern_table +
665 Extern_size * i;
666 ofsAddr = port->tableAddr;
667 switch (brd->numPorts) {
668 case 8:
669 writew(C320p8rx_mask, ofsAddr + RX_mask);
670 writew(C320p8tx_mask, ofsAddr + TX_mask);
671 writew(C320p8rx_spage + i * C320p8buf_pgno, ofsAddr + Page_rxb);
672 writew(readw(ofsAddr + Page_rxb) + C320p8rx_pgno, ofsAddr + EndPage_rxb);
673 writew(C320p8tx_spage + i * C320p8buf_pgno, ofsAddr + Page_txb);
674 writew(readw(ofsAddr + Page_txb) + C320p8tx_pgno, ofsAddr + EndPage_txb);
675
676 break;
677 case 16:
678 writew(C320p16rx_mask, ofsAddr + RX_mask);
679 writew(C320p16tx_mask, ofsAddr + TX_mask);
680 writew(C320p16rx_spage + i * C320p16buf_pgno, ofsAddr + Page_rxb);
681 writew(readw(ofsAddr + Page_rxb) + C320p16rx_pgno, ofsAddr + EndPage_rxb);
682 writew(C320p16tx_spage + i * C320p16buf_pgno, ofsAddr + Page_txb);
683 writew(readw(ofsAddr + Page_txb) + C320p16tx_pgno, ofsAddr + EndPage_txb);
684 break;
685
686 case 24:
687 writew(C320p24rx_mask, ofsAddr + RX_mask);
688 writew(C320p24tx_mask, ofsAddr + TX_mask);
689 writew(C320p24rx_spage + i * C320p24buf_pgno, ofsAddr + Page_rxb);
690 writew(readw(ofsAddr + Page_rxb) + C320p24rx_pgno, ofsAddr + EndPage_rxb);
691 writew(C320p24tx_spage + i * C320p24buf_pgno, ofsAddr + Page_txb);
692 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
693 break;
694 case 32:
695 writew(C320p32rx_mask, ofsAddr + RX_mask);
696 writew(C320p32tx_mask, ofsAddr + TX_mask);
697 writew(C320p32tx_ofs, ofsAddr + Ofs_txb);
698 writew(C320p32rx_spage + i * C320p32buf_pgno, ofsAddr + Page_rxb);
699 writew(readb(ofsAddr + Page_rxb), ofsAddr + EndPage_rxb);
700 writew(C320p32tx_spage + i * C320p32buf_pgno, ofsAddr + Page_txb);
701 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
702 break;
703 }
704 }
705 break;
706 }
03718234
JS		 707 return 0;
708}
709
710static int moxa_load_fw(struct moxa_board_conf *brd, const struct firmware *fw)
711{
712 void *ptr = fw->data;
713 char rsn[64];
714 u16 lens[5];
715 size_t len;
716 unsigned int a, lenp, lencnt;
717 int ret = -EINVAL;
718 struct {
719 __le32 magic; /* 0x34303430 */
720 u8 reserved1[2];
721 u8 type; /* UNIX = 3 */
722 u8 model; /* C218T=1, C320T=2, CP204=3 */
723 u8 reserved2[8];
724 __le16 len[5];
725 } *hdr = ptr;
726
727 BUILD_BUG_ON(ARRAY_SIZE(hdr->len) != ARRAY_SIZE(lens));
728
729 if (fw->size < MOXA_FW_HDRLEN) {
730 strcpy(rsn, "too short (even header won't fit)");
731 goto err;
732 }
733 if (hdr->magic != cpu_to_le32(0x30343034)) {
734 sprintf(rsn, "bad magic: %.8x", le32_to_cpu(hdr->magic));
735 goto err;
736 }
737 if (hdr->type != 3) {
738 sprintf(rsn, "not for linux, type is %u", hdr->type);
739 goto err;
740 }
741 if (moxa_check_fw_model(brd, hdr->model)) {
742 sprintf(rsn, "not for this card, model is %u", hdr->model);
743 goto err;
744 }
745
746 len = MOXA_FW_HDRLEN;
747 lencnt = hdr->model == 2 ? 5 : 3;
748 for (a = 0; a < ARRAY_SIZE(lens); a++) {
749 lens[a] = le16_to_cpu(hdr->len[a]);
750 if (lens[a] && len + lens[a] <= fw->size &&
751 moxa_check_fw(&fw->data[len]))
752 printk(KERN_WARNING "moxa firmware: unexpected input "
753 "at offset %u, but going on\n", (u32)len);
754 if (!lens[a] && a < lencnt) {
755 sprintf(rsn, "too few entries in fw file");
756 goto err;
757 }
758 len += lens[a];
759 }
760
761 if (len != fw->size) {
762 sprintf(rsn, "bad length: %u (should be %u)", (u32)fw->size,
763 (u32)len);
764 goto err;
765 }
766
767 ptr += MOXA_FW_HDRLEN;
768 lenp = 0; /* bios */
769
770 strcpy(rsn, "read above");
771
772 ret = moxa_load_bios(brd, ptr, lens[lenp]);
773 if (ret)
774 goto err;
775
776 /* we skip the tty section (lens[1]), since we don't need it */
777 ptr += lens[lenp] + lens[lenp + 1];
778 lenp += 2; /* comm */
779
780 if (hdr->model == 2) {
781 ret = moxa_load_320b(brd, ptr, lens[lenp]);
782 if (ret)
783 goto err;
784 /* skip another tty */
785 ptr += lens[lenp] + lens[lenp + 1];
786 lenp += 2;
787 }
788
789 ret = moxa_load_code(brd, ptr, lens[lenp]);
790 if (ret)
791 goto err;
792
793 return 0;
794err:
795 printk(KERN_ERR "firmware failed to load, reason: %s\n", rsn);
796 return ret;
797}
798
799static int moxa_init_board(struct moxa_board_conf *brd, struct device *dev)
800{
801 const struct firmware *fw;
802 const char *file;
810ab09b
JS		 803 struct moxa_port *p;
804 unsigned int i;
03718234
JS		 805 int ret;
806
810ab09b
JS		 807 brd->ports = kcalloc(MAX_PORTS_PER_BOARD, sizeof(*brd->ports),
808 GFP_KERNEL);
809 if (brd->ports == NULL) {
810 printk(KERN_ERR "cannot allocate memory for ports\n");
811 ret = -ENOMEM;
812 goto err;
813 }
814
815 for (i = 0, p = brd->ports; i < MAX_PORTS_PER_BOARD; i++, p++) {
816 p->type = PORT_16550A;
817 p->close_delay = 5 * HZ / 10;
818 p->cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
819 init_waitqueue_head(&p->open_wait);
820 init_completion(&p->close_wait);
810ab09b
JS		 821 }
822
03718234
JS		 823 switch (brd->boardType) {
824 case MOXA_BOARD_C218_ISA:
825 case MOXA_BOARD_C218_PCI:
826 file = "c218tunx.cod";
827 break;
828 case MOXA_BOARD_CP204J:
829 file = "cp204unx.cod";
830 break;
831 default:
832 file = "c320tunx.cod";
833 break;
834 }
835
836 ret = request_firmware(&fw, file, dev);
837 if (ret) {
838 printk(KERN_ERR "request_firmware failed\n");
810ab09b 839 goto err_free;
03718234
JS		 840 }
841
842 ret = moxa_load_fw(brd, fw);
843
844 release_firmware(fw);
810ab09b
JS		 845
846 if (ret)
847 goto err_free;
848
849 brd->ready = 1;
850
0bcc4caa
JS		 851 if (!timer_pending(&moxaTimer))
852 mod_timer(&moxaTimer, jiffies + HZ / 50);
853
810ab09b
JS		 854 return 0;
855err_free:
856 kfree(brd->ports);
857err:
03718234
JS		 858 return ret;
859}
860
810ab09b
JS		 861static void moxa_board_deinit(struct moxa_board_conf *brd)
862{
7bcf97d1 863 spin_lock_bh(&moxa_lock);
810ab09b 864 brd->ready = 0;
7bcf97d1 865 spin_unlock_bh(&moxa_lock);
810ab09b
JS		 866 iounmap(brd->basemem);
867 brd->basemem = NULL;
868 kfree(brd->ports);
869}
870
1da177e4 871#ifdef CONFIG_PCI
9cde5bf0
JS		 872static int __devinit moxa_pci_probe(struct pci_dev *pdev,
873 const struct pci_device_id *ent)
1da177e4 874{
9cde5bf0
JS		 875 struct moxa_board_conf *board;
876 unsigned int i;
877 int board_type = ent->driver_data;
878 int retval;
879
880 retval = pci_enable_device(pdev);
7aeb95da
JS		 881 if (retval) {
882 dev_err(&pdev->dev, "can't enable pci device\n");
9cde5bf0 883 goto err;
7aeb95da 884 }
9cde5bf0
JS		 885
886 for (i = 0; i < MAX_BOARDS; i++)
887 if (moxa_boards[i].basemem == NULL)
888 break;
889
890 retval = -ENODEV;
891 if (i >= MAX_BOARDS) {
7aeb95da 892 dev_warn(&pdev->dev, "more than %u MOXA Intellio family boards "
9cde5bf0
JS		 893 "found. Board is ignored.\n", MAX_BOARDS);
894 goto err;
895 }
896
897 board = &moxa_boards[i];
e46a5e3f
JS		 898
899 retval = pci_request_region(pdev, 2, "moxa-base");
900 if (retval) {
901 dev_err(&pdev->dev, "can't request pci region 2\n");
902 goto err;
903 }
904
905 board->basemem = ioremap(pci_resource_start(pdev, 2), 0x4000);
7aeb95da
JS		 906 if (board->basemem == NULL) {
907 dev_err(&pdev->dev, "can't remap io space 2\n");
e46a5e3f 908 goto err_reg;
7aeb95da 909 }
9cde5bf0 910
1da177e4
LT		 911 board->boardType = board_type;
912 switch (board_type) {
913 case MOXA_BOARD_C218_ISA:
914 case MOXA_BOARD_C218_PCI:
915 board->numPorts = 8;
916 break;
917
918 case MOXA_BOARD_CP204J:
919 board->numPorts = 4;
920 break;
921 default:
922 board->numPorts = 0;
923 break;
924 }
925 board->busType = MOXA_BUS_TYPE_PCI;
a784bf7c 926
03718234
JS		 927 retval = moxa_init_board(board, &pdev->dev);
928 if (retval)
929 goto err_base;
930
9cde5bf0 931 pci_set_drvdata(pdev, board);
1da177e4
LT		 932
933 return (0);
03718234
JS		 934err_base:
935 iounmap(board->basemem);
936 board->basemem = NULL;
e46a5e3f
JS		 937err_reg:
938 pci_release_region(pdev, 2);
9cde5bf0
JS		 939err:
940 return retval;
941}
942
943static void __devexit moxa_pci_remove(struct pci_dev *pdev)
944{
945 struct moxa_board_conf *brd = pci_get_drvdata(pdev);
946
810ab09b
JS		 947 moxa_board_deinit(brd);
948
e46a5e3f 949 pci_release_region(pdev, 2);
1da177e4 950}
a784bf7c
JS		 951
952static struct pci_driver moxa_pci_driver = {
953 .name = "moxa",
954 .id_table = moxa_pcibrds,
955 .probe = moxa_pci_probe,
956 .remove = __devexit_p(moxa_pci_remove)
957};
1da177e4
LT		 958#endif /* CONFIG_PCI */
959
960static int __init moxa_init(void)
961{
810ab09b 962 unsigned int isabrds = 0;
d353eca4 963 int retval = 0;
1da177e4 964
7aeb95da
JS		 965 printk(KERN_INFO "MOXA Intellio family driver version %s\n",
966 MOXA_VERSION);
1da177e4
LT		 967 moxaDriver = alloc_tty_driver(MAX_PORTS + 1);
968 if (!moxaDriver)
969 return -ENOMEM;
970
1da177e4 971 moxaDriver->owner = THIS_MODULE;
9b4e3b13 972 moxaDriver->name = "ttyMX";
1da177e4
LT		 973 moxaDriver->major = ttymajor;
974 moxaDriver->minor_start = 0;
975 moxaDriver->type = TTY_DRIVER_TYPE_SERIAL;
976 moxaDriver->subtype = SERIAL_TYPE_NORMAL;
977 moxaDriver->init_termios = tty_std_termios;
1da177e4 978 moxaDriver->init_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
606d099c
AC		 979 moxaDriver->init_termios.c_ispeed = 9600;
980 moxaDriver->init_termios.c_ospeed = 9600;
1da177e4
LT		 981 moxaDriver->flags = TTY_DRIVER_REAL_RAW;
982 tty_set_operations(moxaDriver, &moxa_ops);
983
7aeb95da 984 pr_debug("Moxa tty devices major number = %d\n", ttymajor);
1da177e4
LT		 985
986 if (tty_register_driver(moxaDriver)) {
987 printk(KERN_ERR "Couldn't install MOXA Smartio family driver !\n");
988 put_tty_driver(moxaDriver);
989 return -1;
990 }
1da177e4 991
d353eca4 992 /* Find the boards defined from module args. */
1da177e4 993#ifdef MODULE
d353eca4
JS		 994 {
995 struct moxa_board_conf *brd = moxa_boards;
810ab09b 996 unsigned int i;
1da177e4 997 for (i = 0; i < MAX_BOARDS; i++) {
d353eca4
JS		 998 if (!baseaddr[i])
999 break;
1000 if (type[i] == MOXA_BOARD_C218_ISA ||
1001 type[i] == MOXA_BOARD_C320_ISA) {
7aeb95da 1002 pr_debug("Moxa board %2d: %s board(baseAddr=%lx)\n",
d353eca4
JS		 1003 isabrds + 1, moxa_brdname[type[i] - 1],
1004 baseaddr[i]);
1005 brd->boardType = type[i];
1006 brd->numPorts = type[i] == MOXA_BOARD_C218_ISA ? 8 :
1007 numports[i];
1008 brd->busType = MOXA_BUS_TYPE_ISA;
1009 brd->basemem = ioremap(baseaddr[i], 0x4000);
1010 if (!brd->basemem) {
1011 printk(KERN_ERR "moxa: can't remap %lx\n",
1012 baseaddr[i]);
1da177e4
LT		 1013 continue;
1014 }
03718234
JS		 1015 if (moxa_init_board(brd, NULL)) {
1016 iounmap(brd->basemem);
1017 brd->basemem = NULL;
1018 continue;
1019 }
d353eca4
JS		 1020
1021 brd++;
1022 isabrds++;
1da177e4
LT		 1023 }
1024 }
d353eca4 1025 }
1da177e4 1026#endif
a784bf7c 1027
1da177e4 1028#ifdef CONFIG_PCI
a784bf7c
JS		 1029 retval = pci_register_driver(&moxa_pci_driver);
1030 if (retval) {
1031 printk(KERN_ERR "Can't register moxa pci driver!\n");
d353eca4 1032 if (isabrds)
a784bf7c 1033 retval = 0;
1da177e4
LT		 1034 }
1035#endif
a784bf7c 1036
a784bf7c 1037 return retval;
1da177e4
LT		 1038}
1039
1040static void __exit moxa_exit(void)
1041{
1042 int i;
1043
c251ae0d 1044 del_timer_sync(&moxaTimer);
1da177e4 1045
1da177e4 1046 if (tty_unregister_driver(moxaDriver))
7aeb95da
JS		 1047 printk(KERN_ERR "Couldn't unregister MOXA Intellio family "
1048 "serial driver\n");
1da177e4 1049 put_tty_driver(moxaDriver);
86fbf148 1050
9cde5bf0 1051#ifdef CONFIG_PCI
a784bf7c 1052 pci_unregister_driver(&moxa_pci_driver);
9cde5bf0 1053#endif
a784bf7c 1054
810ab09b
JS		 1055 for (i = 0; i < MAX_BOARDS; i++) /* ISA boards */
1056 if (moxa_boards[i].ready)
1057 moxa_board_deinit(&moxa_boards[i]);
1da177e4
LT		 1058}
1059
1060module_init(moxa_init);
1061module_exit(moxa_exit);
1062
1da177e4
LT		 1063static int moxa_open(struct tty_struct *tty, struct file *filp)
1064{
810ab09b 1065 struct moxa_board_conf *brd;
8f8ecbad 1066 struct moxa_port *ch;
1da177e4
LT		 1067 int port;
1068 int retval;
1da177e4 1069
11324edd 1070 port = tty->index;
1da177e4 1071 if (port == MAX_PORTS) {
74d7d97b 1072 return capable(CAP_SYS_ADMIN) ? 0 : -EPERM;
1da177e4 1073 }
810ab09b
JS		 1074 brd = &moxa_boards[port / MAX_PORTS_PER_BOARD];
1075 if (!brd->ready)
1076 return -ENODEV;
1da177e4 1077
810ab09b 1078 ch = &brd->ports[port % MAX_PORTS_PER_BOARD];
1da177e4
LT		 1079 ch->count++;
1080 tty->driver_data = ch;
1081 ch->tty = tty;
1082 if (!(ch->asyncflags & ASYNC_INITIALIZED)) {
1083 ch->statusflags = 0;
db1acaa6 1084 moxa_set_tty_param(tty, tty->termios);
b4173f45
JS		 1085 MoxaPortLineCtrl(ch, 1, 1);
1086 MoxaPortEnable(ch);
1da177e4
LT		 1087 ch->asyncflags |= ASYNC_INITIALIZED;
1088 }
6f56b658 1089 retval = moxa_block_till_ready(tty, filp, ch);
1da177e4
LT		 1090
1091 moxa_unthrottle(tty);
1092
1093 if (ch->type == PORT_16550A) {
b4173f45 1094 MoxaSetFifo(ch, 1);
1da177e4 1095 } else {
b4173f45 1096 MoxaSetFifo(ch, 0);
1da177e4
LT		 1097 }
1098
1099 return (retval);
1100}
1101
1102static void moxa_close(struct tty_struct *tty, struct file *filp)
1103{
8f8ecbad 1104 struct moxa_port *ch;
1da177e4
LT		 1105 int port;
1106
11324edd 1107 port = tty->index;
1da177e4
LT		 1108 if (port == MAX_PORTS) {
1109 return;
1110 }
1da177e4
LT		 1111 if (tty->driver_data == NULL) {
1112 return;
1113 }
1114 if (tty_hung_up_p(filp)) {
1115 return;
1116 }
8f8ecbad 1117 ch = (struct moxa_port *) tty->driver_data;
1da177e4
LT		 1118
1119 if ((tty->count == 1) && (ch->count != 1)) {
7aeb95da
JS		 1120 printk(KERN_WARNING "moxa_close: bad serial port count; "
1121 "tty->count is 1, ch->count is %d\n", ch->count);
1da177e4
LT		 1122 ch->count = 1;
1123 }
1124 if (--ch->count < 0) {
7aeb95da
JS		 1125 printk(KERN_WARNING "moxa_close: bad serial port count, "
1126 "device=%s\n", tty->name);
1da177e4
LT		 1127 ch->count = 0;
1128 }
1129 if (ch->count) {
1130 return;
1131 }
1132 ch->asyncflags |= ASYNC_CLOSING;
1133
1134 ch->cflag = tty->termios->c_cflag;
1135 if (ch->asyncflags & ASYNC_INITIALIZED) {
6f56b658 1136 moxa_setup_empty_event(tty);
1da177e4 1137 tty_wait_until_sent(tty, 30 * HZ); /* 30 seconds timeout */
1da177e4 1138 }
6f56b658 1139 moxa_shut_down(ch);
b4173f45 1140 MoxaPortFlushData(ch, 2);
1da177e4
LT		 1141
1142 if (tty->driver->flush_buffer)
1143 tty->driver->flush_buffer(tty);
1144 tty_ldisc_flush(tty);
1145
1146 tty->closing = 0;
1da177e4
LT		 1147 ch->tty = NULL;
1148 if (ch->blocked_open) {
1149 if (ch->close_delay) {
1150 msleep_interruptible(jiffies_to_msecs(ch->close_delay));
1151 }
1152 wake_up_interruptible(&ch->open_wait);
1153 }
1154 ch->asyncflags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
95e07914 1155 complete_all(&ch->close_wait);
1da177e4
LT		 1156}
1157
1158static int moxa_write(struct tty_struct *tty,
1159 const unsigned char *buf, int count)
1160{
b4173f45 1161 struct moxa_port *ch = tty->driver_data;
b4173f45 1162 int len;
1da177e4 1163
1da177e4 1164 if (ch == NULL)
b4173f45 1165 return 0;
33f0f88f 1166
7bcf97d1 1167 spin_lock_bh(&moxa_lock);
2108eba5 1168 len = MoxaPortWriteData(ch, buf, count);
7bcf97d1 1169 spin_unlock_bh(&moxa_lock);
1da177e4
LT		 1170
1171 /*********************************************
1172 if ( !(ch->statusflags & LOWWAIT) &&
1173 ((len != count) || (MoxaPortTxFree(port) <= 100)) )
1174 ************************************************/
1175 ch->statusflags |= LOWWAIT;
1176 return (len);
1177}
1178
1179static int moxa_write_room(struct tty_struct *tty)
1180{
8f8ecbad 1181 struct moxa_port *ch;
1da177e4
LT		 1182
1183 if (tty->stopped)
1184 return (0);
b4173f45 1185 ch = tty->driver_data;
1da177e4
LT		 1186 if (ch == NULL)
1187 return (0);
b4173f45 1188 return MoxaPortTxFree(ch);
1da177e4
LT		 1189}
1190
1191static void moxa_flush_buffer(struct tty_struct *tty)
1192{
b4173f45 1193 struct moxa_port *ch = tty->driver_data;
1da177e4
LT		 1194
1195 if (ch == NULL)
1196 return;
b4173f45 1197 MoxaPortFlushData(ch, 1);
1da177e4
LT		 1198 tty_wakeup(tty);
1199}
1200
1201static int moxa_chars_in_buffer(struct tty_struct *tty)
1202{
b4173f45 1203 struct moxa_port *ch = tty->driver_data;
1da177e4 1204 int chars;
1da177e4
LT		 1205
1206 /*
1207 * Sigh...I have to check if driver_data is NULL here, because
1208 * if an open() fails, the TTY subsystem eventually calls
1209 * tty_wait_until_sent(), which calls the driver's chars_in_buffer()
1210 * routine. And since the open() failed, we return 0 here. TDJ
1211 */
1212 if (ch == NULL)
1213 return (0);
b4173f45 1214 chars = MoxaPortTxQueue(ch);
1da177e4
LT		 1215 if (chars) {
1216 /*
1217 * Make it possible to wakeup anything waiting for output
1218 * in tty_ioctl.c, etc.
1219 */
1220 if (!(ch->statusflags & EMPTYWAIT))
6f56b658 1221 moxa_setup_empty_event(tty);
1da177e4
LT		 1222 }
1223 return (chars);
1224}
1225
1226static void moxa_flush_chars(struct tty_struct *tty)
1227{
1228 /*
1229 * Don't think I need this, because this is called to empty the TX
1230 * buffer for the 16450, 16550, etc.
1231 */
1232}
1233
1234static void moxa_put_char(struct tty_struct *tty, unsigned char c)
1235{
b4173f45 1236 struct moxa_port *ch = tty->driver_data;
1da177e4 1237
1da177e4
LT		 1238 if (ch == NULL)
1239 return;
7bcf97d1 1240 spin_lock_bh(&moxa_lock);
b4173f45 1241 MoxaPortWriteData(ch, &c, 1);
7bcf97d1 1242 spin_unlock_bh(&moxa_lock);
1da177e4
LT		 1243 /************************************************
1244 if ( !(ch->statusflags & LOWWAIT) && (MoxaPortTxFree(port) <= 100) )
1245 *************************************************/
1246 ch->statusflags |= LOWWAIT;
1247}
1248
1249static int moxa_tiocmget(struct tty_struct *tty, struct file *file)
1250{
b4173f45 1251 struct moxa_port *ch = tty->driver_data;
1da177e4
LT		 1252 int flag = 0, dtr, rts;
1253
74d7d97b
JS		 1254 if (!ch)
1255 return -EINVAL;
1da177e4 1256
b4173f45 1257 MoxaPortGetLineOut(ch, &dtr, &rts);
1da177e4
LT		 1258 if (dtr)
1259 flag |= TIOCM_DTR;
1260 if (rts)
1261 flag |= TIOCM_RTS;
b4173f45 1262 dtr = MoxaPortLineStatus(ch);
1da177e4
LT		 1263 if (dtr & 1)
1264 flag |= TIOCM_CTS;
1265 if (dtr & 2)
1266 flag |= TIOCM_DSR;
1267 if (dtr & 4)
1268 flag |= TIOCM_CD;
1269 return flag;
1270}
1271
1272static int moxa_tiocmset(struct tty_struct *tty, struct file *file,
1273 unsigned int set, unsigned int clear)
1274{
b4173f45 1275 struct moxa_port *ch = tty->driver_data;
1da177e4
LT		 1276 int port;
1277 int dtr, rts;
1278
11324edd 1279 port = tty->index;
74d7d97b
JS		 1280 if (!ch)
1281 return -EINVAL;
1da177e4 1282
b4173f45 1283 MoxaPortGetLineOut(ch, &dtr, &rts);
1da177e4
LT		 1284 if (set & TIOCM_RTS)
1285 rts = 1;
1286 if (set & TIOCM_DTR)
1287 dtr = 1;
1288 if (clear & TIOCM_RTS)
1289 rts = 0;
1290 if (clear & TIOCM_DTR)
1291 dtr = 0;
b4173f45 1292 MoxaPortLineCtrl(ch, dtr, rts);
1da177e4
LT		 1293 return 0;
1294}
1295
1da177e4
LT		 1296static void moxa_throttle(struct tty_struct *tty)
1297{
8f8ecbad 1298 struct moxa_port *ch = (struct moxa_port *) tty->driver_data;
1da177e4
LT		 1299
1300 ch->statusflags |= THROTTLE;
1301}
1302
1303static void moxa_unthrottle(struct tty_struct *tty)
1304{
8f8ecbad 1305 struct moxa_port *ch = (struct moxa_port *) tty->driver_data;
1da177e4
LT		 1306
1307 ch->statusflags &= ~THROTTLE;
1308}
1309
1310static void moxa_set_termios(struct tty_struct *tty,
606d099c 1311 struct ktermios *old_termios)
1da177e4 1312{
8f8ecbad 1313 struct moxa_port *ch = (struct moxa_port *) tty->driver_data;
1da177e4
LT		 1314
1315 if (ch == NULL)
1316 return;
db1acaa6 1317 moxa_set_tty_param(tty, old_termios);
1da177e4
LT		 1318 if (!(old_termios->c_cflag & CLOCAL) &&
1319 (tty->termios->c_cflag & CLOCAL))
1320 wake_up_interruptible(&ch->open_wait);
1321}
1322
1323static void moxa_stop(struct tty_struct *tty)
1324{
8f8ecbad 1325 struct moxa_port *ch = (struct moxa_port *) tty->driver_data;
1da177e4
LT		 1326
1327 if (ch == NULL)
1328 return;
b4173f45 1329 MoxaPortTxDisable(ch);
1da177e4
LT		 1330 ch->statusflags |= TXSTOPPED;
1331}
1332
1333
1334static void moxa_start(struct tty_struct *tty)
1335{
8f8ecbad 1336 struct moxa_port *ch = (struct moxa_port *) tty->driver_data;
1da177e4
LT		 1337
1338 if (ch == NULL)
1339 return;
1340
1341 if (!(ch->statusflags & TXSTOPPED))
1342 return;
1343
b4173f45 1344 MoxaPortTxEnable(ch);
1da177e4
LT		 1345 ch->statusflags &= ~TXSTOPPED;
1346}
1347
1348static void moxa_hangup(struct tty_struct *tty)
1349{
8f8ecbad 1350 struct moxa_port *ch = (struct moxa_port *) tty->driver_data;
1da177e4
LT		 1351
1352 moxa_flush_buffer(tty);
6f56b658 1353 moxa_shut_down(ch);
1da177e4
LT		 1354 ch->count = 0;
1355 ch->asyncflags &= ~ASYNC_NORMAL_ACTIVE;
1356 ch->tty = NULL;
1357 wake_up_interruptible(&ch->open_wait);
1358}
1359
7bcf97d1 1360static void moxa_new_dcdstate(struct moxa_port *p, u8 dcd)
1da177e4 1361{
7bcf97d1 1362 dcd = !!dcd;
1da177e4 1363
7bcf97d1
JS		 1364 if ((dcd != p->DCDState) && p->tty && C_CLOCAL(p->tty)) {
1365 if (!dcd) {
1366 tty_hangup(p->tty);
1367 p->asyncflags &= ~ASYNC_NORMAL_ACTIVE;
1368 }
1369 wake_up_interruptible(&p->open_wait);
1370 }
1371 p->DCDState = dcd;
1372}
1da177e4 1373
7bcf97d1
JS		 1374static int moxa_poll_port(struct moxa_port *p, unsigned int handle,
1375 u16 __iomem *ip)
1376{
1377 struct tty_struct *tty = p->tty;
1378 void __iomem *ofsAddr;
1379 unsigned int inited = p->asyncflags & ASYNC_INITIALIZED;
1380 u16 intr;
1381
1382 if (tty) {
1383 if ((p->statusflags & EMPTYWAIT) &&
1384 MoxaPortTxQueue(p) == 0) {
1385 p->statusflags &= ~EMPTYWAIT;
1386 tty_wakeup(tty);
1387 }
1388 if ((p->statusflags & LOWWAIT) && !tty->stopped &&
1389 MoxaPortTxQueue(p) <= WAKEUP_CHARS) {
1390 p->statusflags &= ~LOWWAIT;
1391 tty_wakeup(tty);
1392 }
1393
1394 if (inited && !(p->statusflags & THROTTLE) &&
1395 MoxaPortRxQueue(p) > 0) { /* RX */
1396 MoxaPortReadData(p);
1397 tty_schedule_flip(tty);
1398 }
1399 } else {
1400 p->statusflags &= ~EMPTYWAIT;
1401 MoxaPortFlushData(p, 0); /* flush RX */
1da177e4 1402 }
0bcc4caa 1403
7bcf97d1
JS		 1404 if (!handle) /* nothing else to do */
1405 return 0;
1406
1407 intr = readw(ip); /* port irq status */
1408 if (intr == 0)
1409 return 0;
1410
1411 writew(0, ip); /* ACK port */
1412 ofsAddr = p->tableAddr;
1413 if (intr & IntrTx) /* disable tx intr */
1414 writew(readw(ofsAddr + HostStat) & ~WakeupTx,
1415 ofsAddr + HostStat);
1416
1417 if (!inited)
1418 return 0;
1419
1420 if (tty && (intr & IntrBreak) && !I_IGNBRK(tty)) { /* BREAK */
1421 tty_insert_flip_char(tty, 0, TTY_BREAK);
1422 tty_schedule_flip(tty);
1423 }
1424
1425 if (intr & IntrLine)
1426 moxa_new_dcdstate(p, readb(ofsAddr + FlagStat) & DCD_state);
1427
1428 return 0;
1429}
1430
1431static void moxa_poll(unsigned long ignored)
1432{
1433 struct moxa_board_conf *brd;
1434 u16 __iomem *ip;
1435 unsigned int card, port;
1436
1437 spin_lock(&moxa_lock);
1da177e4 1438 for (card = 0; card < MAX_BOARDS; card++) {
7bcf97d1
JS		 1439 brd = &moxa_boards[card];
1440 if (!brd->ready)
1da177e4 1441 continue;
7bcf97d1
JS		 1442
1443 ip = NULL;
1444 if (readb(brd->intPend) == 0xff)
1445 ip = brd->intTable + readb(brd->intNdx);
1446
1447 for (port = 0; port < brd->numPorts; port++)
1448 moxa_poll_port(&brd->ports[port], !!ip, ip + port);
1449
1450 if (ip)
1451 writeb(0, brd->intPend); /* ACK */
1452
1453 if (moxaLowWaterChk) {
1454 struct moxa_port *p = brd->ports;
1455 for (port = 0; port < brd->numPorts; port++, p++)
1456 if (p->lowChkFlag) {
1457 p->lowChkFlag = 0;
1458 moxa_low_water_check(p->tableAddr);
1da177e4 1459 }
1da177e4
LT		 1460 }
1461 }
7bcf97d1
JS		 1462 moxaLowWaterChk = 0;
1463 spin_unlock(&moxa_lock);
1da177e4 1464
aa7e5221 1465 mod_timer(&moxaTimer, jiffies + HZ / 50);
1da177e4
LT		 1466}
1467
1468/******************************************************************************/
1469
db1acaa6 1470static void moxa_set_tty_param(struct tty_struct *tty, struct ktermios *old_termios)
1da177e4 1471{
606d099c 1472 register struct ktermios *ts;
8f8ecbad 1473 struct moxa_port *ch;
db1acaa6 1474 int rts, cts, txflow, rxflow, xany, baud;
1da177e4 1475
8f8ecbad 1476 ch = (struct moxa_port *) tty->driver_data;
1da177e4 1477 ts = tty->termios;
1da177e4
LT		 1478 rts = cts = txflow = rxflow = xany = 0;
1479 if (ts->c_cflag & CRTSCTS)
1480 rts = cts = 1;
1481 if (ts->c_iflag & IXON)
1482 txflow = 1;
1483 if (ts->c_iflag & IXOFF)
1484 rxflow = 1;
1485 if (ts->c_iflag & IXANY)
1486 xany = 1;
db1acaa6
AC		 1487
1488 /* Clear the features we don't support */
1489 ts->c_cflag &= ~CMSPAR;
b4173f45
JS		 1490 MoxaPortFlowCtrl(ch, rts, cts, txflow, rxflow, xany);
1491 baud = MoxaPortSetTermio(ch, ts, tty_get_baud_rate(tty));
db1acaa6
AC		 1492 if (baud == -1)
1493 baud = tty_termios_baud_rate(old_termios);
1494 /* Not put the baud rate into the termios data */
1495 tty_encode_baud_rate(tty, baud, baud);
1da177e4
LT		 1496}
1497
6f56b658 1498static int moxa_block_till_ready(struct tty_struct *tty, struct file *filp,
8f8ecbad 1499 struct moxa_port *ch)
1da177e4
LT		 1500{
1501 DECLARE_WAITQUEUE(wait,current);
1da177e4
LT		 1502 int retval;
1503 int do_clocal = C_CLOCAL(tty);
1504
1505 /*
1506 * If the device is in the middle of being closed, then block
1507 * until it's done, and then try again.
1508 */
1509 if (tty_hung_up_p(filp) || (ch->asyncflags & ASYNC_CLOSING)) {
1510 if (ch->asyncflags & ASYNC_CLOSING)
95e07914 1511 wait_for_completion_interruptible(&ch->close_wait);
1da177e4
LT		 1512#ifdef SERIAL_DO_RESTART
1513 if (ch->asyncflags & ASYNC_HUP_NOTIFY)
1514 return (-EAGAIN);
1515 else
1516 return (-ERESTARTSYS);
1517#else
1518 return (-EAGAIN);
1519#endif
1520 }
1521 /*
1522 * If non-blocking mode is set, then make the check up front
1523 * and then exit.
1524 */
1525 if (filp->f_flags & O_NONBLOCK) {
1526 ch->asyncflags |= ASYNC_NORMAL_ACTIVE;
1527 return (0);
1528 }
1529 /*
1530 * Block waiting for the carrier detect and the line to become free
1531 */
1532 retval = 0;
1533 add_wait_queue(&ch->open_wait, &wait);
7aeb95da 1534 pr_debug("block_til_ready before block: ttys%d, count = %d\n",
b4173f45 1535 tty->index, ch->count);
7bcf97d1 1536 spin_lock_bh(&moxa_lock);
1da177e4
LT		 1537 if (!tty_hung_up_p(filp))
1538 ch->count--;
1da177e4 1539 ch->blocked_open++;
7bcf97d1 1540 spin_unlock_bh(&moxa_lock);
33f0f88f 1541
1da177e4
LT		 1542 while (1) {
1543 set_current_state(TASK_INTERRUPTIBLE);
1544 if (tty_hung_up_p(filp) ||
1545 !(ch->asyncflags & ASYNC_INITIALIZED)) {
1546#ifdef SERIAL_DO_RESTART
1547 if (ch->asyncflags & ASYNC_HUP_NOTIFY)
1548 retval = -EAGAIN;
1549 else
1550 retval = -ERESTARTSYS;
1551#else
1552 retval = -EAGAIN;
1553#endif
1554 break;
1555 }
1556 if (!(ch->asyncflags & ASYNC_CLOSING) && (do_clocal ||
7bcf97d1 1557 ch->DCDState))
1da177e4
LT		 1558 break;
1559
1560 if (signal_pending(current)) {
1561 retval = -ERESTARTSYS;
1562 break;
1563 }
1564 schedule();
1565 }
1566 set_current_state(TASK_RUNNING);
1567 remove_wait_queue(&ch->open_wait, &wait);
33f0f88f 1568
7bcf97d1 1569 spin_lock_bh(&moxa_lock);
1da177e4
LT		 1570 if (!tty_hung_up_p(filp))
1571 ch->count++;
1572 ch->blocked_open--;
7bcf97d1 1573 spin_unlock_bh(&moxa_lock);
7aeb95da 1574 pr_debug("block_til_ready after blocking: ttys%d, count = %d\n",
b4173f45 1575 tty->index, ch->count);
1da177e4
LT		 1576 if (retval)
1577 return (retval);
33f0f88f 1578 /* FIXME: review to see if we need to use set_bit on these */
1da177e4 1579 ch->asyncflags |= ASYNC_NORMAL_ACTIVE;
33f0f88f 1580 return 0;
1da177e4
LT		 1581}
1582
6f56b658 1583static void moxa_setup_empty_event(struct tty_struct *tty)
1da177e4 1584{
8f8ecbad 1585 struct moxa_port *ch = tty->driver_data;
1da177e4 1586
7bcf97d1 1587 spin_lock_bh(&moxa_lock);
1da177e4 1588 ch->statusflags |= EMPTYWAIT;
7bcf97d1 1589 spin_unlock_bh(&moxa_lock);
1da177e4
LT		 1590}
1591
6f56b658 1592static void moxa_shut_down(struct moxa_port *ch)
1da177e4
LT		 1593{
1594 struct tty_struct *tp;
1595
1596 if (!(ch->asyncflags & ASYNC_INITIALIZED))
1597 return;
1598
1599 tp = ch->tty;
1600
b4173f45 1601 MoxaPortDisable(ch);
1da177e4
LT		 1602
1603 /*
1604 * If we're a modem control device and HUPCL is on, drop RTS & DTR.
1605 */
1606 if (tp->termios->c_cflag & HUPCL)
b4173f45 1607 MoxaPortLineCtrl(ch, 0, 0);
1da177e4
LT		 1608
1609 ch->asyncflags &= ~ASYNC_INITIALIZED;
1610}
1611
1da177e4
LT		 1612/*****************************************************************************
1613 * Driver level functions: *
1da177e4 1614 *****************************************************************************/
1da177e4 1615
b4173f45 1616static void MoxaPortFlushData(struct moxa_port *port, int mode)
1da177e4
LT		 1617{
1618 void __iomem *ofsAddr;
1619 if ((mode < 0) || (mode > 2))
1620 return;
b4173f45 1621 ofsAddr = port->tableAddr;
1da177e4
LT		 1622 moxafunc(ofsAddr, FC_FlushQueue, mode);
1623 if (mode != 1) {
b4173f45 1624 port->lowChkFlag = 0;
6f56b658 1625 moxa_low_water_check(ofsAddr);
1da177e4
LT		 1626 }
1627}
1628
1da177e4
LT		 1629/*****************************************************************************
1630 * Port level functions: *
1da177e4
LT		 1631 * 2. MoxaPortEnable(int port); *
1632 * 3. MoxaPortDisable(int port); *
1633 * 4. MoxaPortGetMaxBaud(int port); *
1da177e4 1634 * 6. MoxaPortSetBaud(int port, long baud); *
1da177e4
LT		 1635 * 8. MoxaPortSetTermio(int port, unsigned char *termio); *
1636 * 9. MoxaPortGetLineOut(int port, int *dtrState, int *rtsState); *
1637 * 10. MoxaPortLineCtrl(int port, int dtrState, int rtsState); *
1638 * 11. MoxaPortFlowCtrl(int port, int rts, int cts, int rx, int tx,int xany); *
1639 * 12. MoxaPortLineStatus(int port); *
1da177e4
LT		 1640 * 15. MoxaPortFlushData(int port, int mode); *
1641 * 16. MoxaPortWriteData(int port, unsigned char * buffer, int length); *
33f0f88f 1642 * 17. MoxaPortReadData(int port, struct tty_struct *tty); *
1da177e4
LT		 1643 * 20. MoxaPortTxQueue(int port); *
1644 * 21. MoxaPortTxFree(int port); *
1645 * 22. MoxaPortRxQueue(int port); *
1da177e4
LT		 1646 * 24. MoxaPortTxDisable(int port); *
1647 * 25. MoxaPortTxEnable(int port); *
1da177e4 1648 * 27. MoxaPortResetBrkCnt(int port); *
1da177e4
LT		 1649 *****************************************************************************/
1650/*
1651 * Moxa Port Number Description:
1652 *
1653 * MOXA serial driver supports up to 4 MOXA-C218/C320 boards. And,
1654 * the port number using in MOXA driver functions will be 0 to 31 for
1655 * first MOXA board, 32 to 63 for second, 64 to 95 for third and 96
1656 * to 127 for fourth. For example, if you setup three MOXA boards,
1657 * first board is C218, second board is C320-16 and third board is
1658 * C320-32. The port number of first board (C218 - 8 ports) is from
1659 * 0 to 7. The port number of second board (C320 - 16 ports) is form
1660 * 32 to 47. The port number of third board (C320 - 32 ports) is from
1661 * 64 to 95. And those port numbers form 8 to 31, 48 to 63 and 96 to
1662 * 127 will be invalid.
1663 *
1664 *
1665 * Moxa Functions Description:
1666 *
1667 * Function 1: Driver initialization routine, this routine must be
1668 * called when initialized driver.
1669 * Syntax:
1670 * void MoxaDriverInit();
1671 *
1672 *
1673 * Function 2: Moxa driver private IOCTL command processing.
1674 * Syntax:
1675 * int MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port);
1676 *
1677 * unsigned int cmd : IOCTL command
1678 * unsigned long arg : IOCTL argument
1679 * int port : port number (0 - 127)
1680 *
1681 * return: 0 (OK)
1682 * -EINVAL
1683 * -ENOIOCTLCMD
1684 *
1685 *
1da177e4
LT		 1686 * Function 6: Enable this port to start Tx/Rx data.
1687 * Syntax:
1688 * void MoxaPortEnable(int port);
1689 * int port : port number (0 - 127)
1690 *
1691 *
1692 * Function 7: Disable this port
1693 * Syntax:
1694 * void MoxaPortDisable(int port);
1695 * int port : port number (0 - 127)
1696 *
1697 *
1698 * Function 8: Get the maximun available baud rate of this port.
1699 * Syntax:
1700 * long MoxaPortGetMaxBaud(int port);
1701 * int port : port number (0 - 127)
1702 *
1703 * return: 0 : this port is invalid
1704 * 38400/57600/115200 bps
1705 *
1706 *
1da177e4
LT		 1707 * Function 10: Setting baud rate of this port.
1708 * Syntax:
1709 * long MoxaPortSetBaud(int port, long baud);
1710 * int port : port number (0 - 127)
1711 * long baud : baud rate (50 - 115200)
1712 *
1713 * return: 0 : this port is invalid or baud < 50
1714 * 50 - 115200 : the real baud rate set to the port, if
1715 * the argument baud is large than maximun
1716 * available baud rate, the real setting
1717 * baud rate will be the maximun baud rate.
1718 *
1719 *
1da177e4
LT		 1720 * Function 12: Configure the port.
1721 * Syntax:
606d099c 1722 * int MoxaPortSetTermio(int port, struct ktermios *termio, speed_t baud);
1da177e4 1723 * int port : port number (0 - 127)
606d099c 1724 * struct ktermios * termio : termio structure pointer
c7bce309 1725 * speed_t baud : baud rate
1da177e4
LT		 1726 *
1727 * return: -1 : this port is invalid or termio == NULL
1728 * 0 : setting O.K.
1729 *
1730 *
1731 * Function 13: Get the DTR/RTS state of this port.
1732 * Syntax:
1733 * int MoxaPortGetLineOut(int port, int *dtrState, int *rtsState);
1734 * int port : port number (0 - 127)
1735 * int * dtrState : pointer to INT to receive the current DTR
1736 * state. (if NULL, this function will not
1737 * write to this address)
1738 * int * rtsState : pointer to INT to receive the current RTS
1739 * state. (if NULL, this function will not
1740 * write to this address)
1741 *
1742 * return: -1 : this port is invalid
1743 * 0 : O.K.
1744 *
1745 *
1746 * Function 14: Setting the DTR/RTS output state of this port.
1747 * Syntax:
1748 * void MoxaPortLineCtrl(int port, int dtrState, int rtsState);
1749 * int port : port number (0 - 127)
1750 * int dtrState : DTR output state (0: off, 1: on)
1751 * int rtsState : RTS output state (0: off, 1: on)
1752 *
1753 *
1754 * Function 15: Setting the flow control of this port.
1755 * Syntax:
1756 * void MoxaPortFlowCtrl(int port, int rtsFlow, int ctsFlow, int rxFlow,
1757 * int txFlow,int xany);
1758 * int port : port number (0 - 127)
1759 * int rtsFlow : H/W RTS flow control (0: no, 1: yes)
1760 * int ctsFlow : H/W CTS flow control (0: no, 1: yes)
1761 * int rxFlow : S/W Rx XON/XOFF flow control (0: no, 1: yes)
1762 * int txFlow : S/W Tx XON/XOFF flow control (0: no, 1: yes)
1763 * int xany : S/W XANY flow control (0: no, 1: yes)
1764 *
1765 *
1766 * Function 16: Get ths line status of this port
1767 * Syntax:
1768 * int MoxaPortLineStatus(int port);
1769 * int port : port number (0 - 127)
1770 *
1771 * return: Bit 0 - CTS state (0: off, 1: on)
1772 * Bit 1 - DSR state (0: off, 1: on)
1773 * Bit 2 - DCD state (0: off, 1: on)
1774 *
1775 *
1da177e4
LT		 1776 * Function 19: Flush the Rx/Tx buffer data of this port.
1777 * Syntax:
1778 * void MoxaPortFlushData(int port, int mode);
1779 * int port : port number (0 - 127)
1780 * int mode
1781 * 0 : flush the Rx buffer
1782 * 1 : flush the Tx buffer
1783 * 2 : flush the Rx and Tx buffer
1784 *
1785 *
1786 * Function 20: Write data.
1787 * Syntax:
1788 * int MoxaPortWriteData(int port, unsigned char * buffer, int length);
1789 * int port : port number (0 - 127)
1790 * unsigned char * buffer : pointer to write data buffer.
1791 * int length : write data length
1792 *
1793 * return: 0 - length : real write data length
1794 *
1795 *
1796 * Function 21: Read data.
1797 * Syntax:
33f0f88f 1798 * int MoxaPortReadData(int port, struct tty_struct *tty);
1da177e4 1799 * int port : port number (0 - 127)
33f0f88f 1800 * struct tty_struct *tty : tty for data
1da177e4
LT		 1801 *
1802 * return: 0 - length : real read data length
1803 *
1804 *
1da177e4
LT		 1805 * Function 24: Get the Tx buffer current queued data bytes
1806 * Syntax:
1807 * int MoxaPortTxQueue(int port);
1808 * int port : port number (0 - 127)
1809 *
1810 * return: .. : Tx buffer current queued data bytes
1811 *
1812 *
1813 * Function 25: Get the Tx buffer current free space
1814 * Syntax:
1815 * int MoxaPortTxFree(int port);
1816 * int port : port number (0 - 127)
1817 *
1818 * return: .. : Tx buffer current free space
1819 *
1820 *
1821 * Function 26: Get the Rx buffer current queued data bytes
1822 * Syntax:
1823 * int MoxaPortRxQueue(int port);
1824 * int port : port number (0 - 127)
1825 *
1826 * return: .. : Rx buffer current queued data bytes
1827 *
1828 *
1da177e4
LT		 1829 * Function 28: Disable port data transmission.
1830 * Syntax:
1831 * void MoxaPortTxDisable(int port);
1832 * int port : port number (0 - 127)
1833 *
1834 *
1835 * Function 29: Enable port data transmission.
1836 * Syntax:
1837 * void MoxaPortTxEnable(int port);
1838 * int port : port number (0 - 127)
1839 *
1840 *
1da177e4
LT		 1841 * Function 31: Get the received BREAK signal count and reset it.
1842 * Syntax:
1843 * int MoxaPortResetBrkCnt(int port);
1844 * int port : port number (0 - 127)
1845 *
1846 * return: 0 - .. : BREAK signal count
1847 *
1848 *
1da177e4 1849 */
1da177e4 1850
b4173f45 1851static void MoxaPortEnable(struct moxa_port *port)
1da177e4
LT		 1852{
1853 void __iomem *ofsAddr;
1da177e4
LT		 1854 short lowwater = 512;
1855
b4173f45 1856 ofsAddr = port->tableAddr;
1da177e4 1857 writew(lowwater, ofsAddr + Low_water);
b4173f45
JS		 1858 if (port->board->boardType == MOXA_BOARD_C320_ISA ||
1859 port->board->boardType == MOXA_BOARD_C320_PCI) {
1da177e4
LT		 1860 moxafunc(ofsAddr, FC_SetBreakIrq, 0);
1861 } else {
1862 writew(readw(ofsAddr + HostStat) | WakeupBreak, ofsAddr + HostStat);
1863 }
1864
1865 moxafunc(ofsAddr, FC_SetLineIrq, Magic_code);
1866 moxafunc(ofsAddr, FC_FlushQueue, 2);
1867
1868 moxafunc(ofsAddr, FC_EnableCH, Magic_code);
1869 MoxaPortLineStatus(port);
1870}
1871
b4173f45 1872static void MoxaPortDisable(struct moxa_port *port)
1da177e4 1873{
b4173f45 1874 void __iomem *ofsAddr = port->tableAddr;
1da177e4
LT		 1875
1876 moxafunc(ofsAddr, FC_SetFlowCtl, 0); /* disable flow control */
1877 moxafunc(ofsAddr, FC_ClrLineIrq, Magic_code);
1878 writew(0, ofsAddr + HostStat);
1879 moxafunc(ofsAddr, FC_DisableCH, Magic_code);
1880}
1881
b4173f45 1882static long MoxaPortGetMaxBaud(struct moxa_port *port)
1da177e4 1883{
b4173f45
JS		 1884 if (port->board->boardType == MOXA_BOARD_C320_ISA ||
1885 port->board->boardType == MOXA_BOARD_C320_PCI)
1da177e4
LT		 1886 return (460800L);
1887 else
1888 return (921600L);
1889}
1890
1891
b4173f45 1892static long MoxaPortSetBaud(struct moxa_port *port, long baud)
1da177e4
LT		 1893{
1894 void __iomem *ofsAddr;
1895 long max, clock;
1896 unsigned int val;
1897
1898 if ((baud < 50L) || ((max = MoxaPortGetMaxBaud(port)) == 0))
1899 return (0);
b4173f45 1900 ofsAddr = port->tableAddr;
1da177e4
LT		 1901 if (baud > max)
1902 baud = max;
1903 if (max == 38400L)
1904 clock = 614400L; /* for 9.8304 Mhz : max. 38400 bps */
1905 else if (max == 57600L)
1906 clock = 691200L; /* for 11.0592 Mhz : max. 57600 bps */
1907 else
1908 clock = 921600L; /* for 14.7456 Mhz : max. 115200 bps */
1909 val = clock / baud;
1910 moxafunc(ofsAddr, FC_SetBaud, val);
1911 baud = clock / val;
1da177e4
LT		 1912 return (baud);
1913}
1914
b4173f45
JS		 1915static int MoxaPortSetTermio(struct moxa_port *port, struct ktermios *termio,
1916 speed_t baud)
1da177e4
LT		 1917{
1918 void __iomem *ofsAddr;
1919 tcflag_t cflag;
1da177e4
LT		 1920 tcflag_t mode = 0;
1921
b4173f45 1922 ofsAddr = port->tableAddr;
1da177e4
LT		 1923 cflag = termio->c_cflag; /* termio->c_cflag */
1924
1925 mode = termio->c_cflag & CSIZE;
1926 if (mode == CS5)
1927 mode = MX_CS5;
1928 else if (mode == CS6)
1929 mode = MX_CS6;
1930 else if (mode == CS7)
1931 mode = MX_CS7;
1932 else if (mode == CS8)
1933 mode = MX_CS8;
1934
1935 if (termio->c_cflag & CSTOPB) {
1936 if (mode == MX_CS5)
1937 mode |= MX_STOP15;
1938 else
1939 mode |= MX_STOP2;
1940 } else
1941 mode |= MX_STOP1;
1942
1943 if (termio->c_cflag & PARENB) {
1944 if (termio->c_cflag & PARODD)
1945 mode |= MX_PARODD;
1946 else
1947 mode |= MX_PAREVEN;
1948 } else
1949 mode |= MX_PARNONE;
1950
1951 moxafunc(ofsAddr, FC_SetDataMode, (ushort) mode);
1952
b4173f45
JS		 1953 if (port->board->boardType == MOXA_BOARD_C320_ISA ||
1954 port->board->boardType == MOXA_BOARD_C320_PCI) {
c7bce309 1955 if (baud >= 921600L)
1da177e4
LT		 1956 return (-1);
1957 }
db1acaa6 1958 baud = MoxaPortSetBaud(port, baud);
1da177e4
LT		 1959
1960 if (termio->c_iflag & (IXON | IXOFF | IXANY)) {
1961 writeb(termio->c_cc[VSTART], ofsAddr + FuncArg);
1962 writeb(termio->c_cc[VSTOP], ofsAddr + FuncArg1);
1963 writeb(FC_SetXonXoff, ofsAddr + FuncCode);
6f56b658 1964 moxa_wait_finish(ofsAddr);
1da177e4
LT		 1965
1966 }
db1acaa6 1967 return (baud);
1da177e4
LT		 1968}
1969
b4173f45
JS		 1970static int MoxaPortGetLineOut(struct moxa_port *port, int *dtrState,
1971 int *rtsState)
1da177e4
LT		 1972{
1973
b4173f45
JS		 1974 if (dtrState)
1975 *dtrState = !!(port->lineCtrl & DTR_ON);
1976 if (rtsState)
1977 *rtsState = !!(port->lineCtrl & RTS_ON);
1978
1da177e4
LT		 1979 return (0);
1980}
1981
b4173f45 1982static void MoxaPortLineCtrl(struct moxa_port *port, int dtr, int rts)
1da177e4 1983{
b4173f45 1984 int mode = 0;
1da177e4 1985
1da177e4
LT		 1986 if (dtr)
1987 mode |= DTR_ON;
1988 if (rts)
1989 mode |= RTS_ON;
b4173f45
JS		 1990 port->lineCtrl = mode;
1991 moxafunc(port->tableAddr, FC_LineControl, mode);
1da177e4
LT		 1992}
1993
b4173f45
JS		 1994static void MoxaPortFlowCtrl(struct moxa_port *port, int rts, int cts,
1995 int txflow, int rxflow, int txany)
1da177e4 1996{
b4173f45 1997 int mode = 0;
1da177e4 1998
1da177e4
LT		 1999 if (rts)
2000 mode |= RTS_FlowCtl;
2001 if (cts)
2002 mode |= CTS_FlowCtl;
2003 if (txflow)
2004 mode |= Tx_FlowCtl;
2005 if (rxflow)
2006 mode |= Rx_FlowCtl;
2007 if (txany)
2008 mode |= IXM_IXANY;
b4173f45 2009 moxafunc(port->tableAddr, FC_SetFlowCtl, mode);
1da177e4
LT		 2010}
2011
b4173f45 2012static int MoxaPortLineStatus(struct moxa_port *port)
1da177e4
LT		 2013{
2014 void __iomem *ofsAddr;
2015 int val;
2016
b4173f45
JS		 2017 ofsAddr = port->tableAddr;
2018 if (port->board->boardType == MOXA_BOARD_C320_ISA ||
2019 port->board->boardType == MOXA_BOARD_C320_PCI) {
1da177e4
LT		 2020 moxafunc(ofsAddr, FC_LineStatus, 0);
2021 val = readw(ofsAddr + FuncArg);
2022 } else {
2023 val = readw(ofsAddr + FlagStat) >> 4;
2024 }
2025 val &= 0x0B;
7bcf97d1 2026 if (val & 8)
1da177e4 2027 val |= 4;
7bcf97d1 2028 moxa_new_dcdstate(port, val & 8);
1da177e4 2029 val &= 7;
7bcf97d1 2030 return val;
1da177e4
LT		 2031}
2032
2108eba5
JS		 2033static int MoxaPortWriteData(struct moxa_port *port,
2034 const unsigned char *buffer, int len)
1da177e4 2035{
1da177e4 2036 void __iomem *baseAddr, *ofsAddr, *ofs;
2108eba5
JS		 2037 unsigned int c, total;
2038 u16 head, tail, tx_mask, spage, epage;
2039 u16 pageno, pageofs, bufhead;
1da177e4 2040
b4173f45
JS		 2041 ofsAddr = port->tableAddr;
2042 baseAddr = port->board->basemem;
1da177e4
LT		 2043 tx_mask = readw(ofsAddr + TX_mask);
2044 spage = readw(ofsAddr + Page_txb);
2045 epage = readw(ofsAddr + EndPage_txb);
2046 tail = readw(ofsAddr + TXwptr);
2047 head = readw(ofsAddr + TXrptr);
2108eba5 2048 c = (head > tail) ? (head - tail - 1) : (head - tail + tx_mask);
1da177e4
LT		 2049 if (c > len)
2050 c = len;
b4173f45 2051 moxaLog.txcnt[port->tty->index] += c;
1da177e4
LT		 2052 total = c;
2053 if (spage == epage) {
2054 bufhead = readw(ofsAddr + Ofs_txb);
2055 writew(spage, baseAddr + Control_reg);
2056 while (c > 0) {
2057 if (head > tail)
2058 len = head - tail - 1;
2059 else
2060 len = tx_mask + 1 - tail;
2061 len = (c > len) ? len : c;
2062 ofs = baseAddr + DynPage_addr + bufhead + tail;
2108eba5
JS		 2063 memcpy_toio(ofs, buffer, len);
2064 buffer += len;
1da177e4
LT		 2065 tail = (tail + len) & tx_mask;
2066 c -= len;
2067 }
1da177e4 2068 } else {
1da177e4
LT		 2069 pageno = spage + (tail >> 13);
2070 pageofs = tail & Page_mask;
2108eba5
JS		 2071 while (c > 0) {
2072 len = Page_size - pageofs;
2073 if (len > c)
2074 len = c;
1da177e4
LT		 2075 writeb(pageno, baseAddr + Control_reg);
2076 ofs = baseAddr + DynPage_addr + pageofs;
2108eba5
JS		 2077 memcpy_toio(ofs, buffer, len);
2078 buffer += len;
1da177e4
LT		 2079 if (++pageno == epage)
2080 pageno = spage;
2081 pageofs = 0;
2108eba5
JS		 2082 c -= len;
2083 }
2084 tail = (tail + total) & tx_mask;
1da177e4 2085 }
2108eba5 2086 writew(tail, ofsAddr + TXwptr);
1da177e4 2087 writeb(1, ofsAddr + CD180TXirq); /* start to send */
2108eba5 2088 return total;
1da177e4
LT		 2089}
2090
7bcf97d1 2091static int MoxaPortReadData(struct moxa_port *port)
1da177e4 2092{
7bcf97d1 2093 struct tty_struct *tty = port->tty;
2108eba5 2094 unsigned char *dst;
1da177e4 2095 void __iomem *baseAddr, *ofsAddr, *ofs;
2108eba5
JS		 2096 unsigned int count, len, total;
2097 u16 tail, rx_mask, spage, epage;
2098 u16 pageno, pageofs, bufhead, head;
1da177e4 2099
b4173f45
JS		 2100 ofsAddr = port->tableAddr;
2101 baseAddr = port->board->basemem;
1da177e4
LT		 2102 head = readw(ofsAddr + RXrptr);
2103 tail = readw(ofsAddr + RXwptr);
2104 rx_mask = readw(ofsAddr + RX_mask);
2105 spage = readw(ofsAddr + Page_rxb);
2106 epage = readw(ofsAddr + EndPage_rxb);
2108eba5 2107 count = (tail >= head) ? (tail - head) : (tail - head + rx_mask + 1);
1da177e4 2108 if (count == 0)
33f0f88f 2109 return 0;
1da177e4 2110
33f0f88f 2111 total = count;
7bcf97d1 2112 moxaLog.rxcnt[tty->index] += total;
1da177e4
LT		 2113 if (spage == epage) {
2114 bufhead = readw(ofsAddr + Ofs_rxb);
2115 writew(spage, baseAddr + Control_reg);
2116 while (count > 0) {
1da177e4 2117 ofs = baseAddr + DynPage_addr + bufhead + head;
2108eba5
JS		 2118 len = (tail >= head) ? (tail - head) :
2119 (rx_mask + 1 - head);
2120 len = tty_prepare_flip_string(tty, &dst,
2121 min(len, count));
2122 memcpy_fromio(dst, ofs, len);
1da177e4
LT		 2123 head = (head + len) & rx_mask;
2124 count -= len;
2125 }
1da177e4 2126 } else {
1da177e4
LT		 2127 pageno = spage + (head >> 13);
2128 pageofs = head & Page_mask;
2108eba5 2129 while (count > 0) {
1da177e4
LT		 2130 writew(pageno, baseAddr + Control_reg);
2131 ofs = baseAddr + DynPage_addr + pageofs;
2108eba5
JS		 2132 len = tty_prepare_flip_string(tty, &dst,
2133 min(Page_size - pageofs, count));
2134 memcpy_fromio(dst, ofs, len);
2135
2136 count -= len;
2137 pageofs = (pageofs + len) & Page_mask;
2138 if (pageofs == 0 && ++pageno == epage)
1da177e4 2139 pageno = spage;
2108eba5
JS		 2140 }
2141 head = (head + total) & rx_mask;
1da177e4 2142 }
2108eba5
JS		 2143 writew(head, ofsAddr + RXrptr);
2144 if (readb(ofsAddr + FlagStat) & Xoff_state) {
1da177e4 2145 moxaLowWaterChk = 1;
b4173f45 2146 port->lowChkFlag = 1;
1da177e4 2147 }
2108eba5 2148 return total;
1da177e4
LT		 2149}
2150
2151
b4173f45 2152static int MoxaPortTxQueue(struct moxa_port *port)
1da177e4 2153{
b4173f45 2154 void __iomem *ofsAddr = port->tableAddr;
2108eba5 2155 u16 rptr, wptr, mask;
1da177e4 2156
1da177e4
LT		 2157 rptr = readw(ofsAddr + TXrptr);
2158 wptr = readw(ofsAddr + TXwptr);
2159 mask = readw(ofsAddr + TX_mask);
2108eba5 2160 return (wptr - rptr) & mask;
1da177e4
LT		 2161}
2162
b4173f45 2163static int MoxaPortTxFree(struct moxa_port *port)
1da177e4 2164{
b4173f45 2165 void __iomem *ofsAddr = port->tableAddr;
2108eba5 2166 u16 rptr, wptr, mask;
1da177e4 2167
1da177e4
LT		 2168 rptr = readw(ofsAddr + TXrptr);
2169 wptr = readw(ofsAddr + TXwptr);
2170 mask = readw(ofsAddr + TX_mask);
2108eba5 2171 return mask - ((wptr - rptr) & mask);
1da177e4
LT		 2172}
2173
b4173f45 2174static int MoxaPortRxQueue(struct moxa_port *port)
1da177e4 2175{
b4173f45 2176 void __iomem *ofsAddr = port->tableAddr;
2108eba5 2177 u16 rptr, wptr, mask;
1da177e4 2178
1da177e4
LT		 2179 rptr = readw(ofsAddr + RXrptr);
2180 wptr = readw(ofsAddr + RXwptr);
2181 mask = readw(ofsAddr + RX_mask);
2108eba5 2182 return (wptr - rptr) & mask;
1da177e4
LT		 2183}
2184
b4173f45 2185static void MoxaPortTxDisable(struct moxa_port *port)
1da177e4 2186{
b4173f45 2187 moxafunc(port->tableAddr, FC_SetXoffState, Magic_code);
1da177e4
LT		 2188}
2189
b4173f45 2190static void MoxaPortTxEnable(struct moxa_port *port)
1da177e4 2191{
b4173f45 2192 moxafunc(port->tableAddr, FC_SetXonState, Magic_code);
1da177e4
LT		 2193}
2194
8f8ecbad 2195static int moxa_get_serial_info(struct moxa_port *info,
1da177e4
LT		 2196 struct serial_struct __user *retinfo)
2197{
2198 struct serial_struct tmp;
2199
2200 memset(&tmp, 0, sizeof(tmp));
2201 tmp.type = info->type;
b4173f45 2202 tmp.line = info->tty->index;
1da177e4
LT		 2203 tmp.port = 0;
2204 tmp.irq = 0;
2205 tmp.flags = info->asyncflags;
2206 tmp.baud_base = 921600;
2207 tmp.close_delay = info->close_delay;
1da177e4
LT		 2208 tmp.custom_divisor = 0;
2209 tmp.hub6 = 0;
2210 if(copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2211 return -EFAULT;
2212 return (0);
2213}
2214
2215
8f8ecbad 2216static int moxa_set_serial_info(struct moxa_port *info,
1da177e4
LT		 2217 struct serial_struct __user *new_info)
2218{
2219 struct serial_struct new_serial;
2220
2221 if(copy_from_user(&new_serial, new_info, sizeof(new_serial)))
2222 return -EFAULT;
2223
2224 if ((new_serial.irq != 0) ||
2225 (new_serial.port != 0) ||
2226// (new_serial.type != info->type) ||
2227 (new_serial.custom_divisor != 0) ||
2228 (new_serial.baud_base != 921600))
2229 return (-EPERM);
2230
2231 if (!capable(CAP_SYS_ADMIN)) {
2232 if (((new_serial.flags & ~ASYNC_USR_MASK) !=
2233 (info->asyncflags & ~ASYNC_USR_MASK)))
2234 return (-EPERM);
2235 } else {
2236 info->close_delay = new_serial.close_delay * HZ / 100;
1da177e4
LT		 2237 }
2238
2239 new_serial.flags = (new_serial.flags & ~ASYNC_FLAGS);
2240 new_serial.flags |= (info->asyncflags & ASYNC_FLAGS);
2241
2242 if (new_serial.type == PORT_16550A) {
b4173f45 2243 MoxaSetFifo(info, 1);
1da177e4 2244 } else {
b4173f45 2245 MoxaSetFifo(info, 0);
1da177e4
LT		 2246 }
2247
2248 info->type = new_serial.type;
2249 return (0);
2250}
2251
2252
2253
2254/*****************************************************************************
2255 * Static local functions: *
2256 *****************************************************************************/
1da177e4 2257
b4173f45 2258static void MoxaSetFifo(struct moxa_port *port, int enable)
1da177e4 2259{
b4173f45 2260 void __iomem *ofsAddr = port->tableAddr;
1da177e4
LT		 2261
2262 if (!enable) {
2263 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 0);
2264 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 1);
2265 } else {
2266 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 3);
2267 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 16);
2268 }
2269}
Linux kernel - Deliverables
This page took 0.77213 seconds and 5 git commands to generate.